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Inventory (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 CAD ($) emissionCredit | Dec. 31, 2019 CAD ($) emissionCredit
Disclosure of inventories [Abstract] |  |
Inventory write-down | $ | $ 37 |
Additions to emission credits | emissionCredit | 1,434,761 | 388,155
Purchased emission credits | $ | $ 38 | $ 4
Inventory, emission credits | emissionCredit | 502,653 | 411,115

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- Definition The amount of expense recognised related to the write-down of inventories to net realisable value. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 2 -IssueDate 2019-01-01 -Paragraph 36 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=2&code=ifrs-tx-2019-en-r&anchor=para_36_e&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 98 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_98_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Additions To Emission Credits + References No definition available. + Details
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- Definition Inventory, emission credits + References No definition available. + Details
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